Canon iR2020 Series Service manual

Sep 14 2005
General Timing Chart / General
Circuit Diagram
iR2020/2016 Series

IMPORTANT
This documentation is published by Canon Inc., Japan, to serve as a source of reference for
work in the field.
Specifications and other information contained herein may vary slightly from actual machine
values or those found in advertising and other printed matter.
Any questions regarding the information contained herein should be directed to the Copier Service
Department of the Sales Company.
This documentation is intended for all sales areas, and may contain information not applicable
to certain areas.
Reproduction without permission not allowed.
Use of this manual should be strictly supervised to avoid disclosure of confidential information.
COPYRIGHT 2001 CANON INC.
Printed in Japan
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Contents
1 General Timing Chart ............................................................................................................................. 1
At Time of Printing................................................................................................................................. 1
Reader Unit ........................................................................................................................................... 2
2 General Circuit Diagram......................................................................................................................... 5
General Circuit Diagram........................................................................................................................ 5

1
1 General Timing Chart
At Time of Printing
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
2 Prints, Continuous, Cassette 1
F-1-1
STBYLSTRPRINTWAIT STBY INTR
Static eliminator bias
Main motor
(M204)
Fixing motor
(M201)
Scanner motor
Laser
TOP signal
Cassette 1 pickup solenoid
(SL202)
Cassette feed clutch
(CL202)
Registration paper sensor
(SR209)
Registration clutch
(CL203)
No. 1 delivery sensor
(SR203)
Primary AC bias
Fixing film bias
Primary DC bias
Developing AC bias
Developing DC bias
Transfer bias
Main power switch ON Print command received
*1: Horizontal synchronization control
*2: Automatic photocurrent control (APC)
*3: Cleaning bias
*4: Target temperature control
*5: Temperature control in accordance with the fixing mode
*1 *1 *1
*1 *2
*3 *3
Fixing heater
(H1/H2) *4 *4 *5

2
Reader Unit
iR2016J / iR2016 / iR2020 / / iR2016i / iR2020i
Basic Sequence of Operation (in response to a press on the start key; book mode; 1 original)
F-1-2
Basic Secure of Operation (in response to a press on the start key; ADF mode, 1 original )
F-1-3
SCRWSCFWSTBY STBY
: Backward movement
: Forward movement
Start key
ON
Reader motor
(M401)
LED
CISHP sensor
(SR401)
Leading edge
of original
Shading
position Shading position
Trailing edge
of original
Shading correction
SCFWSCRWSTBY STBY
: Backward movement
: Forward movement
Start key
ON
Reader motor
(M401)
LED
CISHP sensor
(SR401)
Stream reading
position Trailing edge of original
Shading
position Shading position
Shading correction

3